package com.itfenghuang.controller;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class RegisterServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("utf-8");
        resp.setContentType("text/html;charset=utf-8");
        String username = req.getParameter("username");
        //通过username去查询数据库中是否存在该用户名
        String str="tom";
        //判断
        if (username.equals("tom")){
            //说明该用户名已经存在
            resp.getWriter().write("<font color='red'>用户名已存在</font>");
        }else {
            resp.getWriter().write("<font color='green'>用户名可以使用</font>");
        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
            doGet(req, resp);
    }
}
